the MinnowBoard uses a SPI based serial flash memory to load the initial code into the Intel Atom E640 series processor. The MinnowBoard uses a WinBond W25Q32 (datasheet) which has a total of 4096KB of storage which can be flashed with a UEFI image or other custom firmware.

Programming Interface

the MinnowBoard has a 2x4 header that has 0.1" spacing for programming the SPI based serial flash memory.

Programming Header

Pin number

Main Function

Note

1

+3.3V Power

Supports on +3.3V

2

GND

system ground

3

nCS

Chip Select Active Low

4

SCK

SPI Clock

5

MISO

Data Output from serial flash

6

MOSI

Data Input to serial flash

7

nPRG_EN

Program Enable Active Low

Applications and Hardware

Flashrom is an open source utility that allows you to work with the SPI based serial flash memory on the MinnowBoard.